4 Buttons 4 LEDs

Projects Programming
1

I have a MIDIUSB sketch I am using with mini arcade buttons that have LEDs included in them.

I am looping through an array of the buttons and the LEDs but the LED just stays lit or does not light.

Button: Mini LED Arcade Button - 24mm Translucent Clear : ID 3429 : $2.50 : Adafruit Industries, Unique & fun DIY electronics and kits

[]-Ground |-5V

[]-Pin 2 |-Pin 6

My goal is if i press button 1 --> led 1 will remain lit until i press another button. I am using the same variable "i" to get the index of the array.

#include "MIDIUSB.h"
#include "PitchToNote.h"
#define NUM_BUTTONS  4

const uint16_t button1 = 2;
const uint16_t button2 = 3;
const uint16_t button3 = 4;
const uint16_t button4 = 5;

const uint16_t led1 = 6;
const uint16_t led2 = 7;
const uint16_t led3 = 8;
const uint16_t led4 = 9;

const uint16_t buttons[NUM_BUTTONS] = {button1, button2, button3, button4};
const uint16_t LEDS[NUM_BUTTONS] = {led1, led2, led3, led4};
const byte notePitches[NUM_BUTTONS] = {pitchC2, pitchD2b, pitchD2, pitchE2b};

uint16_t notesTime[NUM_BUTTONS];
uint16_t pressedButtons = 0x00;
uint16_t previousButtons = 0x00;
uint16_t pressedLEDS = LOW;
uint16_t previousLEDS = HIGH;
uint16_t intensity;

void setup() {
  for (int i = 0; i < NUM_BUTTONS; i++)
    pinMode(buttons[i], INPUT_PULLUP);
  for (int i = 0; i < NUM_BUTTONS; i++)
    pinMode(LEDS[i], OUTPUT);
}


void loop() {
  readButtons();
  readLEDS();
  playNotes();
  playLEDS();
}

void controlChange(byte channel, byte control, byte value) {
  midiEventPacket_t event = {0x0B, 0xB0 | channel, control, value};
  MidiUSB.sendMIDI(event);
}

void readButtons()
{
  for (int i = 0; i < NUM_BUTTONS; i++)
  {
    if (digitalRead(buttons[i]) == LOW)
    {
      bitWrite(pressedButtons, i, 1);
      delay(2);
    }
    else
      bitWrite(pressedButtons, i, 0);
  }
}

void playNotes()
{
  for (int i = 0; i < NUM_BUTTONS; i++)
  {
    if (bitRead(pressedButtons, i) != bitRead(previousButtons, i))
    {
      if (bitRead(pressedButtons, i))
      {
        bitWrite(previousButtons, i , 1);
        noteOn(0, notePitches[i], 100);
        MidiUSB.flush();
      }
      else
      {
        bitWrite(previousButtons, i , 0);
        noteOff(0, notePitches[i], 0);
        MidiUSB.flush();
      }
    }
  }
}

void readLEDS()
{
  for (int i = 0; i < NUM_BUTTONS; i++)
  {
    if (bitRead(pressedButtons, i) != bitRead(previousButtons, i))
    {
      bitWrite(pressedLEDS, i, LOW);
      delay(2);
    }
    else
      bitWrite(pressedLEDS, i, HIGH);
  }
}

void playLEDS()
{
  for (int i = 0; i < NUM_BUTTONS; i++)
  {
    if (bitRead(pressedButtons, i) != bitRead(previousButtons, i))
    {
      if (bitRead(pressedLEDS, i))
      {
        bitWrite(previousLEDS, i, LOW);
      }
      else
      {
        bitWrite(previousLEDS, i, HIGH);
      }
    }
  }
}

void noteOn(byte channel, byte pitch, byte velocity) {
  midiEventPacket_t noteOn = {0x09, 0x90 | channel, pitch, velocity};
  MidiUSB.sendMIDI(noteOn);
}

void noteOff(byte channel, byte pitch, byte velocity) {
  midiEventPacket_t noteOff = {0x08, 0x80 | channel, pitch, velocity};
  MidiUSB.sendMIDI(noteOff);
}

sketch_may07a.ino (2.68 KB)

2

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